#!/usr/bin/env python
# -*- coding:utf-8 -*-

weight = input('请输入体重：')
height = input('请输入身高：')
bmi = float(weight) / (float(height) * float(height))

print(bmi)

if bmi < 18.5:
    print('过轻')
elif 18.5 <= bmi < 25:
    print('正常')
elif 25 <= bmi < 28:
    print('过重')
elif 28 <= bmi < 32:
    print('肥胖')
else:
    print('严重肥胖')
